Implement control_if

Author: adazem009

src/dev/blocks/controlblocks.cpp

@@ -24,6 +24,7 @@ void ControlBlocks::registerBlocks(IEngine *engine)
 {
     engine->addCompileFunction(this, "control_forever", &compileForever);
     engine->addCompileFunction(this, "control_repeat", &compileRepeat);
+    engine->addCompileFunction(this, "control_if", &compileIf);
 }
 
 CompilerValue *ControlBlocks::compileForever(Compiler *compiler)
@@ -40,3 +41,10 @@ CompilerValue *ControlBlocks::compileRepeat(Compiler *compiler)
     compiler->moveToRepeatLoop(compiler->addInput("TIMES"), substack ? substack->valueBlock() : nullptr);
     return nullptr;
 }
+
+CompilerValue *ControlBlocks::compileIf(Compiler *compiler)
+{
+    auto substack = compiler->input("SUBSTACK");
+    compiler->moveToIf(compiler->addInput("CONDITION"), substack ? substack->valueBlock() : nullptr);
+    return nullptr;
+}

src/dev/blocks/controlblocks.h

@@ -18,6 +18,7 @@ class ControlBlocks : public IExtension
     private:
         static CompilerValue *compileForever(Compiler *compiler);
         static CompilerValue *compileRepeat(Compiler *compiler);
+        static CompilerValue *compileIf(Compiler *compiler);
 };
 
 } // namespace libscratchcpp

test/dev/blocks/control_blocks_test.cpp

@@ -105,3 +105,40 @@ TEST_F(ControlBlocksTest, Repeat)
         }
     }
 }
+
+TEST_F(ControlBlocksTest, If)
+{
+    auto target = std::make_shared<Sprite>();
+
+    {
+        ScriptBuilder builder(m_extension.get(), m_engine, target);
+
+        builder.addBlock("control_if");
+        auto substack = std::make_shared<Block>("", "test_print_test");
+        builder.addValueInput("CONDITION", false);
+        builder.addObscuredInput("SUBSTACK", substack);
+
+        builder.addBlock("control_if");
+        substack = std::make_shared<Block>("", "test_print_test");
+        builder.addValueInput("CONDITION", true);
+        builder.addObscuredInput("SUBSTACK", substack);
+
+        builder.build();
+
+        testing::internal::CaptureStdout();
+        builder.run();
+        ASSERT_EQ(testing::internal::GetCapturedStdout(), "test\n");
+    }
+
+    m_engine->clear();
+    target = std::make_shared<Sprite>();
+
+    {
+        ScriptBuilder builder(m_extension.get(), m_engine, target);
+        builder.addBlock("control_if");
+        builder.addValueInput("CONDITION", true);
+
+        builder.build();
+        builder.run();
+    }
+}